Huawei Huawei Certifications H11-861 Questions & Answers

• Question 191:

  The advantages and disdvantages of Forward error correction (FEC) are( ). (Select 2 answers)

  A. it has high requirements for latency, which makes it difficult to use in live networks, it is effective only in slight packet loss. In addition, it results in more video jitter

  B. it occupies little bandwidth and slightly impacts the video quality

  C. The video quality is affected because the redundant data occupies some bandwidth. In addition, it cannot handle burst packet loss, and a certain delay is introduced

  D. it can restore the lost data with a certain probability and it is applicable to common packet loss scenarios

  Correct Answer: CD

• Question 192:

  In H.323 protocol,the last number 3 means( ).

  A. B-ISDN

  B. QOS

  C. PNN

  D. GSTN and radio network

  Correct Answer: C

• Question 193:

  During communication, both endpoints may occupy an event or resource that cannot be shared. To avoid this situation, a master endpoint needs to be determined. When conflicts occur, the standby endpoint should follow the master endpoint. ( )

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 194:

  NAT works at the ( ).

  A. Data link layer

  B. Network layer

  C. Application layer

  D. Transport layer

  Correct Answer: B

• Question 195:

  1080i 50/60 fps: Interlaced scan for images, 50 or 60 fields per second.( )

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 196:

  Video compression standards that are widely used currently include the H.261, H.263, and H.264 of the ITU and MPEG- 1, MPEG-2, and MPEG-4 of the ISO/IEC. The H.26x series standards are used in real-time video communication .The MPEG series standards are used in video storage (on DVDs), video broadcast, and video streaming media;( )

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 197:

  Which of the following is not a disadvantage of forward error correction.( )

  A. Occupation of more bandwidth

  B. Deterioration of video quality

  C. Delay

  D. Aggravation of video jitter

  Correct Answer: D

• Question 198:

  323 is used to deliver multimedia service on packet-switched networks.( )

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 199:

  The FE port IP address cannot be in the same network segment as the GEO or GE1 port IP address. Otherwise, network faults may occur, and the ALM indicator on the front panel is on. ( )

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 200:

  In video firewall mode, the GEO ports of all the boards must be in the same network segment, and all the GE1 ports of all the boards must be in another same network segment.( )

  A. TRUE

  B. FALSE

  Correct Answer: A